Okokuqala, nika isihloko isingeniso esifushane se-aramid ne-PE.
Imishini yefayibha ye-Aramid i-Aramid, eyaziwa nangokuthi i-Kevlar (igama lekhemikhali i-phthalamide) yazalwa ngasekupheleni kwawo-1960. Iwuhlobo olusha lwe-high-tech fiber synthetic fiber, enokumelana nokushisa okuphezulu, ukumelana ne-asidi kanye ne-alkali., Isisindo esilula, amandla aphezulu kanye nezinye izinzuzo, isetshenziswe kakhulu emishinini yokuzivikela evimbela izinhlamvu, ukwakhiwa kanye nemishini kagesi nokunye. amasimu.
Kodwa i-aramid futhi inamaphutha amabili abulalayo:
1) Izokwehlisa izinga lapho ihlangana nemisebe ye-ultraviolet; kulula ukwenza i-hydrolyze, noma ngabe igcinwe endaweni eyomile, izodonsa umswakama emoyeni futhi kancane kancane i-hydrolyze.
Ngakho-ke, ama-aramid bulletproof inserts nama-bulletproof vests awafanele ukusetshenziswa isikhathi eside ezindaweni eziqinile ze-ultraviolet nezinomswakama, okuzonciphisa kakhulu ukusebenza kwazo kokuvikela kanye nempilo yesevisi. Ukwengeza, ukungazinzi kahle nempilo emfushane ye-aramid nakho kukhawulela ukusetshenziswa okuqhubekayo kwe-aramid emkhakheni wokuvikela inhlamvu.
Intengo ye-aramid yekhwalithi ephezulu nayo iphakeme kunaleyo ye-PE, okungenzeka ibe ngama-30% kuya ku-50% ngaphezulu. Njengamanje, imikhiqizo evikela izinhlamvu esebenzisa i-aramid yehle kancane kancane futhi yaqala ukushintshwa ngemikhiqizo ye-PE bulletproof. Ngaphandle kwalapho kusendaweni ekhethekile noma kunezidingo ezikhethekile, njengezinga lokushisa eliphezulu laseMpumalanga Ephakathi, kunconywa ukusebenzisa impahla ye-PE impahla engangenwa bulletproof.
1. I-PE okukhulunywe ngayo ngaphambili emishinini ye-fiber ye-PE empeleni ibhekisela ku-UHMW-PE, okuyi-polyethylene enesisindo samangqamuzana aphezulu kakhulu. Iwumucu wemvelo osebenza kahle kakhulu owasungulwa ekuqaleni kwawo-1980, futhi ubizwa ngokuthi umhlaba namuhla kanye ne-carbon fiber ne-aramid. Imicu emithathu yobuchwepheshe obuphezulu. Izikhwama zepulasitiki ezisetshenziswa ekuphileni kwethu kwansuku zonke empeleni ziyimikhiqizo ye-polyethylene, enokuzinza okuphezulu kakhulu futhi okunzima kakhulu ukuyehlisa, okubangela ukungcoliswa okukhulu kwemvelo. Kodwa kungenxa yalesi sici ukuthi isibe yinto ekahle yokwenza izikhali zomzimba. Ngaphezu kwalokho, inezici zokumelana nokushisa okuphansi, ukumelana ne-UV, nokumelana namanzi.
Mayelana nokuzivikela ngokumelene nezinhlamvu zejubane eliphansi, ukumelana ne-UHMW-PE fibre ballistic cishe ku-30% ephakeme kunaleyo ye-aramid fiber;
Mayelana nokuzivikela kumabhulethi anesivinini esikhulu, amandla okuvikela inhlamvu ye-UHMW-PE fibre yi-1.5 kuya ku-2 izikhathi eziphindwe ka-2 kune-aramid fiber, ngakho-ke i-PE okwamanje ibonwa njengekhwalithi ephezulu kakhulu yezinto ezingangenwa izinhlamvu.
Kodwa-ke, i-UHMW-PE nayo inokushiyeka okuthile: ukumelana kwayo nezinga lokushisa eliphakeme kuncane kakhulu kunokwe-aramid. Izinga lokushisa lokusetshenziswa kwemikhiqizo yezinhlamvu ze-UHMWPE lidinga ukulawulwa ngaphakathi kuka-80°C (okungahlangabezana nezidingo zokushisa komzimba womuntu kanye nemishini -ukumelana nezinga lokushisa elingu-55°C). Uma izinga lokushisa selidlulile, ukusebenza kwalo kuzokwehla ngokushesha, futhi lapho izinga lokushisa lifinyelela ku-150 ° C noma ngaphezulu, lizoncibilika. Imikhiqizo ye-aramid engangenwa izinhlamvu isengakwazi ukugcina isakhiwo esizinzile kanye nokusebenza okuhle kokuvikela endaweni yokushisa ephezulu engu-200 ℃. Ngakho-ke, imikhiqizo ye-PE bulletproof ayifanele ukusetshenziswa ezindaweni zokushisa okuphezulu.
Ukwengeza, ukumelana nokukhasa kwe-PE akukuhle njengalokho kwe-aramid, futhi imishini esebenzisa i-PE izowohloka kancane uma ingaphansi kwengcindezi eqhubekayo. Ngakho-ke, izinto zokusebenza ezifana nezigqoko ezinezimo eziyinkimbinkimbi futhi ezidinga ukumelana nokucindezela isikhathi eside azikwazi ukwenziwa nge-PE.
Ngaphezu kwalezi zici, intengo ye-PE iphansi kakhulu kunaleyo ye-aramid njengoba kushiwo ngaphambili.
Ngokuvamile, i-PE ne-aramid inezinzuzo zayo kanye nokubi. Kodwa-ke, isetshenziswa kabanzi namuhla ukusebenzisa i-PE njengongqimba olungangenwa izinhlamvu. Kusadingeka ukuthi ukhethe okokusebenza okungangenwa izinhlamvu ezifanele ngokwesimo sakho sangempela.
Isikhathi sokuthumela: Aug-20-2021
